Oil well pumping apparatus



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Patented Jan. 2l, 1936 PATENT OFFICE I on. WELL PUMHNG APPARATUS William F. Parker, Troup, Tex., assigner to 'Sinclair Prairie Oil Company, Tulsa, Okla., a corporation of Maine Application .my 26, 1934, seal No. 731,006

'l Claims. (Cl. 74-593) This invention relates to oil well pump devices and more particularly to means for connecting the rod line of a pump jack to one of the pitmen of' a central power apparatus. In pumping a plu- 5 rality of wells from a central power apparatus it is the usual practice to provide means for .disconnecting any one cf the pump jacks from they central power apparatus so that the pumping operation on any one well can be discontinued with-v out stopping the power apparatus. The means now employed for this purpose is crude consist- -ing of a knock-off post and block which requires the operators presence at the kpoint where the rod line is being disconnected from the power pitman.

- An important feature of the present invention is the provision of means for hooking wells oi and on which is operated-by a system of levers thereby permitting the operator to set the device for operation on the next stroke of the pitman and get away from all movingparts before the operaman causes the hook to ride out of the stirrup and` thus disconnect the rod line of the well from the power pitman. The bridle which carries the hook is mounted on a vertical bearing carried by the cross head which allows the pitman to move laterally without transmitting such lateral movement to the rod line. The movement of the cross head on suitable guides transmits a straight line horizontal motion or pull to the rod line. The rod line is Aclamped to the other side of the cross head on a horizontal pivot which permits the rod to assume an angle of 30 on either side of'the horizontal. This is ofparticular importance in the -pumping of a well located close to the ypower apparatus but on a different elevation therefrom.

In the accompanying drawings I have shown one form of the invention. In this showing:

Fig. 1 is aside elevation, parts being shown in section; 1

Y Fig. 2 is a plan view, parts being shown in section; ,W 55 Fig. 3 is a' view similar to Fig. 1 showing the mechanism in operable position for arresting the movement of the cross head and also showing the hook in open position;

Fig. 4 is a longitudinal, sectional view on linev ybottom plate I0 and side plates II.

Fig. 5 is anend elevation of the apparatus viewed from 'the left in Figs. 1 to 4; and

Fig. 6 is a transverse, sectional view on line 6--6 of Fig. 2.

Referring to the drawings, the reference nu- `l;

meral I designates a pitman connected to an eccentric (not shown) of a central power apparatus used for pumping "a plurality of adjacentv oil wells from a single source 'of power. The pitman is provided with a stirrup 2 on its end Vwhich is 10 adapted to receive a hook 3 when the well is connected to the source of power. This hook is mounted on a bridle 4 by means of a suitable pivot pin I5. The hook is provided with anoperating lever 6 having a weight 'I on its upper end which 15 counterbalances the weight of the hook and holds the hook in the inoperative position shown in Fig. 3 when the handle is move'd vdownwardly in a -counter-clockwise direction. Power is transmitted from the pitman I to a rod line 8 which is 20 adapted to be connected to a 'pump jack' (not shown) through the bridle 4 and a cross heads 'I'he cross head consists of an upper plate 9,.a A vertical bearing pin I2 is arranged between the upper and 25 lower plates of the cross head and forms a rotating support for a sleeve I3. The sleeve I3, is weldedv or otherwise secured to a block I4 clamped on the end of the bridle by nuts and bolts I5for' other suitable securing means. Asshownbgthe 30 block I4 extends below the bottom plate of the cross head and forms part of the apparatus"`for I stopping the movement of the crosshead short of the end of the stroke of the pitman when the well is to be. disconnected from the power apparatus. 35l v A bearing, pin I6 is supported between the side plates of the cross head and receives a sleevel I1 forming part of one element of a clamp by means of which the rod line 8 isl secured to 'the cross head. As shown, the sleeve I1 carries a 40 l clamping plate I8 which is provided with a semicylindrical groove for the reception of the rod line Il and a similar plate I9 is adapted to be arranged on the other side of the rod line. These vplates are secured to each other by nuts and 45 bolts 20 or other suitable means to clamp the rod line to the cross head.

The means for stopping the movement of the cross head comprises aiknock-off plate 2i having bearings 22 and 23 formed on opposite ends 50 thereof and adapted to be'v received in sleeves 24 as shown in Fig. 3 of the drawings. The plate 60 is provided with suitable weights 21 adapted to over-balance counter-weight 28 carried by the operating handle 26 so as to automatically lower the plate to inoperative position when the block I4 moves out of contact with it.

The cross head is guided by means of rods 29 which are mounted in tubular members 30. As shown, the tubular members are provided with tubular legs or supports 3l which rest upon a supporting frame or base 3l'. The sides of the tubular members 3I are providedwithlongitudinal slots 32 extending substantially from end to end and the upper plate 9 of the cross head extends through these slots. Bushings 33 are secured to the plate and surround the rods 29. The rods are supported in bearing members 34 at each end of the tubularmembers 30. The ends of the tubular members are closed by suitable closure plates 35 and the tubular members are adapted to receive and retain oil or other lubricant surrounding the rods 29 to a level below the slots 32. The tubular members may be provided with suitable drains 36.

In the operation of the device the hook 3 is normally arranged in the stirrup 2 to connect the cross head and thus the rod line 8 to the power pitman I. To disconnect a well from the source of power the operator lowers the lever 26 to elevate the knock-olf plate to the position shown in Fig. 3 of the drawings. This stops the travel of the cross head carriage before the power pitman I reaches the end of its stroke. When the cross head stops, the pitman continues to travel which causes the hook 3 to be elevated from the stirrup. This lifting process is automatic as the stirrup engages the inner pivot end of the hook. The pitman then continues to travel but the rod line to the well is disconnected. When the well is to be again connected to the source of power, the hook 3 is swung back to its operative posi. tion by means of the handle 6. 0n the return stroke of the pitman the engagement of the hook in the stirrup moves the cross head carriage and when the block I4 moves out of contact with the knock-off plate the weight of this plate lowers it to its inoperative position. The apparatus may then continue to operate. It will be apparent from the above that the parts may be set to disconnect the rod line from the power source by an operator and the operator may then move out of proximity to the moving parts of the apparatus before ther-disconnection takes place.

The vertical bearing I2 in the cross head allows the pitman I to have lateral movement, as well as longitudinal movement, without transmitting such lateral movement to the rod line. The movement of the cross head on the guide rods 29 transmits a straight line horizontal motion or pull to the rod'line.

Likewise, the horizontal pivot I6 which connects the rod line to the cross head permits the rod to be arranged at an angle of 30 in either direction from the horizontal. This feature is of particular importance in connection with a. well located close to the power apparatus but at a diiferent elevation.

I claim:A r f 1. In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head arranged adjacent thereto, a rod line connected to said cross head to permit vertical movement of said rod line, a pivoted hook carried by said driven member and adapted to engage said driving member, and a pivoted plate adapted to be moved into the path of movement of said cross head to arrest its movement before the end of its stroke and cause said hook to disengage. 5

2. In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head and a bridle pivoted to the cross head to permit lateral movement of said bridle, a hook pivotally mounted on said bridle and adawn .ed to engage said driving member, and a pivoted plate adapted to be moved into the path of travel of said cross head to arrest its movement before the end of its stroke and cause said hook to disengage.

3. In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head, a rod line pivotally connected to said cross head to permit vertical movement of said rod line, a hook Ypivotally mounted on said cross head and adapted to engage said driving member, and a pivoted plate adapted to be moved into the path of travel of said cross head to arrest its movement before the end of its stroke and disengage said hook.

4. In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head and a bridle pivoted to the cross head to permit lateral movement of said bridle, a hook pivotally mounted on said bridle and adapted to engage said driving member, and means for arresting the movement of said cross head before the end of its stroke to disengage said hook from said driving member.

5. In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head, a rod line pivotally connected to said cross head to 4o permit vertical movement of said rod line, a hook pivotally mounted on said cross head and adapted to engage said driving member, and means for arresting the movement of said cross head before the end of its stroke to disengage said hook from 45 said driving member.

6. `In a device of the character described, a driving member connected to a source of power, a driven member comprising a cross head arranged adjacent said driving member, tubular 50 members mounted on each side of said cross head, guide-rods arranged in said tubular members on which said cross head travels, a hook pivotally mounted on said cross head and adapted to engage lsaid driving member, and a pivoted plate 55 adapted to be moved into the path of travel of said cross head to arrest its movement before the end of its stroke and disengage said hook froml said driving member. l

'7.`In a device of the character described, a 60 driving member connected to a source of power, a driven member comprising a cross head arranged adjacent said driving member, tubular members arranged on each side of said cross head, guide rods arranged in said tubular members on 65 which said cross head travels, a hook pivotally` mounted on said cross head and adapted to engage s'aid driving member, and means for arresting the movement o f -said cross head before the 

